What are the solutions of the equation x4 – 9x2 + 8 = 0? use u substitution to solve.

Step-by-step explanation:

We have the following equation

To solve this problem, do:

then it has:

Then he has a second-degree equation.

To resolve factor.

You must find 2 numbers that when you add them get -9 and multiply them get 8.

These numbers are:

u = -1 and u = -8

Then it has:

and

Remember that

Then it has:

ANSWER

EXPLANATION

Given;

We can rewrite as

Let

This implies that,

This implies that,

But

This implies that,

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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